1. Waves in Electromagnetic Spectrum

2. Waves Properties of waves include speed, frequency and wavelength
Speed (s), frequency (f) and wavelength (l) are related in the formula l x f = s
All light travels at a speed of 3 s 108 m/s in a vacuum

4. Radio waves Low energy waves with long wavelengths
Includes FM, AM, radar and TV waves
Wavelengths of 10-1m and longer
Low frequency
Used in many devices such as remote control items, cell phones, wireless devices, etc.

6. Microwaves Longer than radio, shorter than light and infrared
Wavelength 1 x m to 1 x m
First used in radar, now used in communication, medicine and consumer use (microwave ovens)

8. Infrared waves
Invisible electromagnetic waves that are detected as heat
Can be detected with special devices such as night goggles
Used in heat lamps
Higher energy than microwaves but lower than visible light

10. Ultraviolet waves Higher energy than light waves
Can cause skin cancer and blindness in humans
Used in tanning beds and sterilizing equipment

12. X-Rays High energy waves First discovered by Roentgen
Used in medicine, industry and astronomy
Can cause cancer

14. Gamma rays Highest energy Blocked from Earth’s surface by atmosphere